I have/had the biggest crush on Yotsuyu. I went totally gaga over Scathach, and pre-martyr Minfillia was total bae. Fran is up there too, but I don't really consider her a true FFXIV character. Other than that, not a whole lot of ladies of FFXIV really stand out in this regard. There are many I adore though like Krile, Tataru, Cirina, Kan E Senna, Alisaie, just to name a few.